Mathematics - Statistics Question with Solution | TestHub

We know that Q.D $=\frac{5}{6}\times M\cdot D.=\frac{5}{6}\times 12=10$ $\therefore \mathrm{S}.\mathrm{D}=\frac{3}{2}\times Q\cdot D.=\frac{3}{2}\times 10\Rightarrow S.D.=15$